Abstract: hospital formal optometry must have strict optometry methods and advanced equipment. After subjective optometry, professional technicians will strictly record the specific degree when trying on the lens. Finally, they will try on the glasses for half an hour. During this period, 25 degrees will be reduced every 10 minutes to test the adaptability of the optician. The whole process of adult glasses matching may take nearly 1 hour., Ms. Zhang feels that her eyesight has decreased recently. Sometimes she can’t see the road clearly when driving. Go to the optical shop, hospital ophthalmology and other places to check and find that the optometry results are different. Which optometry result is correct? How to match the glasses?, Ms. Zhang went to a glasses store for optometry first. Her naked eye vision: right eye 0.6, left eye 0.6. The optometrist’s optometry results were: 75 degree myopia in the right eye, 50 degree myopia in the left eye, and the visual acuity was corrected to 1.0. However, during the audition, Ms. Zhang felt that there was little difference between wearing glasses and not wearing glasses, and the degree was relatively low. It seemed that it was of little significance to wear glasses, so she didn’t wear glasses., However, Ms. Zhang felt that her eyesight was poor and driving was still unsafe. She went to the ophthalmology department of hospital B for optometry this time. The results were as follows: naked eye eyesight: 0.6 in the right eye and 0.6 in the left eye; 100 degree myopia in the right eye and 75 degree myopia in the left eye. The visual acuity was corrected to 1.0. Is the degree higher than last time? Only six days! Moreover, during the audition, Ms. Zhang still felt that there was little difference between wearing glasses and not wearing glasses, and the glasses were still not matched., Recently, Ms. Zhang came to Shijiazhuang Yongliang glasses to check. After explaining the intention, the optometrist’s optometry results are: naked eye vision: right eye 0.6, left eye 0.6; 75 degree myopia in the right eye and 50 degree myopia in the left eye. The visual acuity was corrected to 1.0. The result is the same as that of the first optical shop! What’s going on? After further questioning, we found that Ms. Zhang mainly drives at night, so our optometry results in a simulated night environment are: 50 degree myopia with 50 degree astigmatism in the right eye, 25 degree myopia with 50 degree astigmatism in the left eye, and the visual acuity is corrected to 0.6; When wearing glasses with 75 degree myopia in the right eye and 50 degree myopia in the left eye, the visual acuity was only corrected to 0.3; The night vision without glasses is only 0.1., Why does this happen? Which of the three optometry results is correct? Ms. Zhang raised questions. In this regard, Shijiazhuang Yongliang glasses carefully analyzed and answered as follows: the results of three optometry were correct! Optometry is a subjective examination of psychophysics, which is affected by many factors, such as examination environment, individual, psychology and so on. Let’s take a look at the specific process of three times of optometry: when Ms. Zhang first went to a glasses store, she optometrized according to the light of the normal environment, and her pupils were in medium size. The results of optometry were 75 degree myopia in the right eye and 50 degree myopia in the left eye. Moreover, the difference between naked vision and corrected vision was not obvious, so Ms. Zhang didn’t wear glasses at that time.,
Ms. Zhang feels her eyesight has decreased recently. Sometimes she can’t see the road clearly when driving. Go to the optical shop, hospital ophthalmology and other places to check and find that the optometry results are different. Which optometry result is correct? How to match the glasses?
Ms. Zhang went to a glasses store for optometry first. Her naked eye vision: 0.6 for her right eye and 0.6 for her left eye. The optometrist’s optometry results were: 75 degree myopia in the right eye, 50 degree myopia in the left eye, and the visual acuity was corrected to 1.0. However, during the audition, Ms. Zhang felt that there was little difference between wearing glasses and not wearing glasses, and the degree was relatively low. It seemed that it was of little significance to wear glasses, so she didn’t wear glasses.
but Ms. Zhang felt that her eyesight was poor and driving was still unsafe. She went to the ophthalmology department of hospital B for optometry this time. The results were as follows: naked eye eyesight: 0.6 in the right eye and 0.6 in the left eye; 100 degree myopia in the right eye and 75 degree myopia in the left eye. The visual acuity was corrected to 1.0. Is the degree higher than last time? Only six days! And during the audition, Ms. Zhang still felt that there was little difference between wearing glasses and not wearing glasses, and the glasses were still not matched.
recently, Ms. Zhang came to Shijiazhuang Yongliang glasses for examination. After explaining the intention, the optometrist’s optometry results are: naked eye vision: right eye 0.6, left eye 0.6; 75 degree myopia in the right eye and 50 degree myopia in the left eye. The visual acuity was corrected to 1.0. The result is the same as that of the first optical shop! What’s going on? After further questioning, we found that Ms. Zhang mainly drives at night, so our optometry results in a simulated night environment are: 50 degree myopia with 50 degree astigmatism in the right eye, 25 degree myopia with 50 degree astigmatism in the left eye, and the visual acuity is corrected to 0.6; When wearing glasses with 75 degree myopia in the right eye and 50 degree myopia in the left eye, the visual acuity was only corrected to 0.3; Without glasses, the night vision is only 0.1.
why does this happen? Which of the three optometry results is correct? Ms. Zhang raised questions. In this regard, Shijiazhuang Yongliang glasses carefully analyzed and answered as follows:
three optometry results are correct! Optometry is a subjective examination of psychophysics, which is affected by many factors, such as examination environment, individual, psychology and so on. Let’s take a look at the specific process of three optometry:
when Ms. Zhang first came to a glasses store, she optometry according to the light of the normal environment, and her pupils were in medium size. The results of optometry were 75 degree myopia in the right eye and 50 degree myopia in the left eye. Moreover, the difference between naked vision and corrected vision was not obvious, so Ms. Zhang didn’t wear glasses at that time. On the day when
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went to the hospital for ophthalmic optometry, there were a lot of patients. Ms. Zhang waited in line for a long time before it was her turn to check. She was a little upset. There were a lot of people in the optometry room. There were not only optometrists, but also tonometry and accompanying family members. The light was bright. Under such circumstances, there was a certain tension in regulation, and the pupil was narrowed under bright light, Therefore, the optometry results are: 100 degree myopia in the right eye and 75 degree myopia in the left eye.
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performed optometry at dawn for the third time. After questioning, it was found that Ms. Zhang mainly drove at night. Under the simulated night light contrast environment, the optometry results were: 50 degree myopia with 50 degree astigmatism in the right eye and 50 degree myopia with 50 degree astigmatism in the left eye. Because it’s dark at night, Pupil dilation (and Ms. Zhang’s pupil is relatively large at night, with a diameter of 7.5mm measured in the dark room), astigmatism is exposed, and pupil dilation is also adjusted and relaxed in linkage, so the degree is reduced and low astigmatism occurs.
The results show that Ms. Zhang’s visual quality is sensitive to astigmatism. She has sufficient light and small pupils during the day, and her visual acuity is better when she is not exposed to astigmatism; However, the light is poor at night, and the astigmatism exposure is obvious after pupil enlargement. If astigmatism correction is not used, the vision will be poor and can not meet the needs of driving at night.
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